Item | Index | results of testing | Individual judgment | ||
Premium | First grade | Qualified product | |||
appearance | Transparent liquid, no visible impurities | Transparent liquid, no visible impurities | Premium | ||
Chromaticity, Hazen unit (platinum-diamond color number)≤ | 10 | 15 | 5 | Premium | |
Density (ρ20), g/cm 3 | 0.909-0.811 | 0.808-0.812 | 0.809 | Premium | |
N-Butanol content, % ≥ | 99.5 | 99.0 | 98.0 | 99.9 | Premium |
Moisture, % ≤ | 0.1 | 0.2 | 0.02 | Premium | |
(Acidity (as acetic acid), % ≤ | 0.003 | 0.005 | 0.01 | 0.001 | Premium |
(Sulfuric acid color test (platinum cobalt color number)≤ | 20 | 40 | / | 5 | Premium |
Evaporation residue,% ≤ | 0.003 | 0.005 | 0.01 | / | / |
(Isobutanol, % (special index) | 0.15 | 0.07 | Premium | ||
Butyl Butyrate, % | / | 0.01 | Premium |